I want know what is the procedure for get the new key for node liecance.

Successful deactivation of your license will present a link on the license page in your Customer account (http://my.smartbear.com) to allow you to create a new license key.  (Click on "Get new product key").



With this new key you can re-activate your license on some other machine.

http://support.smartbear.com/viewarticle/8818/



Same procedure if you format and re-install I imagine.